Press f and w to feed and water to the cat (you will need to use the right and left arrow keys to chase after the dishes, and if your cat is not there it doesn't get fed/watered). Press b to brush the cat and s to clean up after the cat (you will need to scroll your mouse over the brush and scoop and then scroll over to the cat or problem). Spacebar will release a ball of yarn that your cat will need to chase after to increase its mood. Also, during the night, the cat will become increasingly sleepy (and of course, if one becomes too sleepy one dies), so everytime the cat is awake, be sure to press n to tell it to take a nap. The cat will also become slightly sleepy towards the end of the day. Clicking on the cat will make it say meow.